Distributor for stokers



Sept. 22, i925. 1,554,636

N. M. LOWER ET AL.

DI STRIBUTOR FOR STOKERS Original Filed March 13, 1922 ,Patented sept. 22, 1925.

NITED STAT NATHAN M. LOWER AND ALBERT RNCHALKER, or PITTSBURGH, PENNSYLVANIA.

AssIGNoRs To LocoMoTIvE sToxER VANIA.

COME/ANY, A CORPORATION F PENNSYL- DISTRIBUTOR FOR STOKERS.

Original' application led March 13, 1922, Serial No. 543,329. Divided and this application led April 7, 1923. Serial No. 630,639.

To all whom t mayconoem:

Be it known that we, NATHAN M. LOWER and ALBERT R. CHALKER, citizens of the United States, and residents of Pittsburgh, county of Allegheny, and State of Pennsyl- Vania, have invented certain new and useful Improvements in Distributors for Stokers, of -which the following is a specification, and which are illustrated the accompanying drawings, forming a part thereof.

This invention relates to distributor tubes or nozzles through which coal is discharged into alire box of a boiler, and while it` is intended to be employed in connection with stokers of various types or designs it is particularly adapted for use on, and for simplicity of illustration is shown as belng connected with, a stoker mechanism of the type forming the subject-matter of Letters Patent .No. 1,371,252 granted to lNathan M. Lower on March the 15th, 1921. This invention relates to the general type of distributors disclosed in our co-pending application S. N. 543,329 filed March 13, 1922 of which this is a division. j

As the invention appertains primarily to the distributor, only so much of the remainder of the stoker mechanism is shown as is necessary to indicate the relation of the parts. 'In stokers of this type, portions thereof extend into the re boX and being subjected to the intense heat therein are rapldly destroyed and must therefore be frequently replaced.

One of the objects of this invention is to provideJ a construction in which the parts of the distributor which are in danger of being burned ofi1 are removable, thus reducing the cost of replacement.

A further object of the invention .is to provide means for cooling the exposed parts and thus lengthening their term of service; and a still further object is toprovide an improved form of baiiie or abutment vwhich not only arrests a portion of the impelled fuel and delivers it to 'the back end of the i fire box, but also cooperates with the deflector plate to evenly distribute the coal over all portions of the grates.

Other and further objects and advantages of the invention will appear from the description, taken in connection with the accompanying drawings, in which-Q Fig. 1 is a detail vertical section through the back head of the locomotive lire box showing the improved distributor applied- 'Fig 1, looking in the directionof the arrows.

The stokers for use with which the im-l proved distributor is especially adapted have heretofore been used in connection with locomotives, althoughit is understood that their use is not limited thereto. There is shown at 10 a portion of the back head of a boiler having an aperture in which is fitted a sleeve 11. A fragment of the stokerv head is shown at 12, which in practice is known as the Stoker elbow. The distributor member or tube 13, which may be of lany suitable shape in cross-section, is fitted to the stoker elbow 12 and is securedthereto by means of a hook bolt 14. The bottom wall of the distributor member or tube is continuous with the side walls thereof, and the parts are so arranged thatthe distributor tube projects into the sleeve 11.

The inner end of the tube 13 terminates substantially in the plane of the inner face of the back head 10 and consequently the same is protected more or less from the intense heat of the fire box. A deflector plate 15 projects forwardly over the top of the tube and is removably secured thereto. Any suitable means may be provided for detachably connecting the delector plate to' the tube. As shown, the defiector plateis provided with a stem'"16 having a socket for fitting upon an upwardly projecting lug 17 on the top of the tube, the inner end of the stem 16 engaging under a lip-18 formed on the tube. Y

Suitable means are provided for causing a portion of the impelled fuel to be distributed over the rear part of the grates. In the embodiment selected to illustrate the invention, a suitable fuel directing member '24, is employed. This member takes the form of'a cross bar presenting an upright face to the advancing fuel and may be termed a baffle or abutment. It is provided with a stem 23 by means of which it may be detachably secured to the tube 13. Means are provided for detachably connecting the stem to the" distributor tube 13. Any suitable attaching means may be used. As shown in Fig. 3 the stem, 25 is provided with, laterally extending,v

i lugs 26, 27, whichare adapted to engage keepers 28 and 29 rigidly secured to the bottom wall rof the tube 13. The rear end of the stem 25 is provided with laterally extending shoulders 30 and 31, which are adapted to engage between the downwardly projectingvl lugs 32 and 33 rigidly securedC to the bottom wall of the tube 13, and which are adapted to prevent the' longitudinal movement of the stem 25.

The stem 25 and the baille plate 24 are cored to form a continuous passage therethrough, as indicated at 34 and 35. The passage 35 extends longitudinally through the batHe plate and is open'at the ends there- At 36 there is shown the usual nipple extending through the floor of the elbow 12 and having a series of jet openings 37 directed through the tube, the nipple 36 being adapted for the attachment thereto at its lower end of a steam pipe 38. 'A pipe or nipple39 leads laterally from the nipple 36 below its jet openings and terminates adjacent to the rear end of the passage 34 through the stem 25 into which it discharges. lThe rear end of the stem 25 is flared as indicated at 4() to permit the entry of air induced by the steam blast from fthe nipple 39 to thereby not .only assist in cooling the lbaille plate or abutment and its supporting stem but also to assist in distributing the fuel over the fire.

In order to permit the pipe 39 toextend well in to the passage 34 and yet provide for the assembling of the parts, the upper wall of the stem 25 may be slotted at its rearward end as indicated at 41.

In the operation of the device the fuel is discharged into the tube 13 from the elbow 12.and is projected forwardly through the tube by the steam issuing from the jet openings 37 and scattered through the tube, some of it lbeing thrown upwardly against the plate 15which detlects it downwardly and scatters it over the central zone of the fire box, the plate 15 preventing the fuel from/J being thrown upwardly and into the boiler tubes; some of the fuel strikes the side walls of the tube and is thereby prevented "from being too widely scattered; some of it will encounter the blasts of air and steam through theopening or passage 35 and will be directed to the sides of the fire box, while some of it is projected forwardly through the tube without encountering any of its walls and is carried well to the front end ofthe fire box. Thelower stratum of the fuel follows the bottom of the tube and encounters the upstanding battle plate or abut- When under the iniiuence of the intense heat of the furnace the bafl'le plate or abut- "ment, or its stem, or the deilector plate becomes burned away or warped, they may be readily replaced by detaching'the same from the tube 13. This detachability of the parts not only reduces the cost of replacement but permits the interchange of parts with the minimum expenditure of labor and since the parts may be replaced without the necessity of waiting for the entire copoling of the firebox, a saving of time in making the change is also effected. 1

/It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of our device will be apparent to those skilled inthe art, and that various changes in size, shape, proportion and details of construction may be made without departing from the spirit and scope of the appended claims.

We claim as our invention:

1. A fuel distributor, comprising a tubular member having a continuous bottom wall, an abutment member located beyond such bottom wall and having its longitudinal axis extending transversely to the axis of said tubular member, said abutment extending above the plane of the bottom wall oisaid tubular member supporting means therefor, and means for detachably securing said supporting means to said tubular member.

2. In combination, a distributor tube for stokers, an abutment extending transverseto the longitudinal axis of said tube and spaced therefrom and rising above the plane of the bottom thereof, and means for detachably securing'the abutment to the tube.

3. In combination, a distributor tube for stokers, an abutment extending transversely to dthe longitudinal axis of said tube and rising above the plane of the bottom thereof, and means for detachably. securing the abutment to the tube, such abutment and attaching means having a continuous passage therethrough, and a pipe discharging into the rearward end of the passage.

4. In combination with a distributor tube for stokers, a T-shaped member, they stem of which is detachably secured to the bottom of the tube and projects beyond the end thereof, and the cross element of which projects above the level of the tube bottom and forms an abutment for fuel issuing from the tube.

NATHAN M. LowER. ALBERT R. CHALKER. 

